Plastic disposable safety razor



May 21 1968 l.. w. sAcHs 3,383,764

v PLASTC DISPOSBLE SAFETY RAZOR Original Filed Oct. 26, 1964 INVENTOR.

5o/VAR@ w. @Ac-Hs A TTOR/Vf'KS' United States Patent O AESTRACT F THEDISCLOSURE The razor of my invention comprises a head, a separate guardmember and a iblade interposed and clamped between the head and guardmembers. The head has integral pins extending through holes in the bladeand guard membe-r. The head and guard members and pins are formed of aninexpensive disposable thermoplastic material deformable by theapplication of heat and pressure,

and the pins have deformed enlarged ends to permanently secure theassembly together. A handle is secured to and projects from the guardmember.

This applica-tion is a division of my copending application Ser. No.406,977 led Oct. 26, 1964, now Patent No. 3,274,683 granted Sept. 27,1966, which is a continuationin-part of Ser. No. 293,056, filed July 5,1963, now abancloned, and the invention relates generally to razors andrefers more particularly to a plastic disposable safety razor.

l-t is an essential object of this invention to provide a razor which isinexpensive and therefore may be thrown away after being used one or twotimes.

Another object is to provide a razor composed of a head, guard, and ablade interposed between the head and guard, the three parts beingsecured together in Ia permanent assembly.

Another object is to provide a razor in which the head and guard areformed of an inexpensive easily molded material such as plastic.

Another object is to provide a disposable safety razor having .anintegral part, preferably in the form of a pin shaped member, extendingfrom the plastic Ihead and engaging the guard to form a permanentassembly.

Another object is to provide .a plastic disposable safety razor in whichat least one, and preferably two integral pins. extend from the headthrough clearances in the blade and in the guard, the pin or pins haveupset ends which are larger than the yclearances in the guard to engagethe underside of the guard and lock the assembled head, blade and guardtogether.

Other objects and features of the invention will become apparent as thedescription proceeds, especially when taken in conjunc-tion with theaccompanying drawing, wherein:

FIGURE 1 is a side elevational View of a safety razor constructed inaccordance with my invention.

FIGURE 2 is a fragmentary sectional view taken on the line 2.-2 inFIGURE 1, and showing a nal step in the method of making the razor.

FIGURE 3 is an lexploded view of the parts in section, taken on the line2-2 in FIGURE 1, showing the pins which extend from the razor headbefore their ends are upset to lock the parts of the assembly together.

FIGURE 4 'is a bottom plan View of the head.

FIGURE 5 is a top plan view of the guard.

FIGURE 6 is a top plan view of the razor blade.

Referring now more particularly to the drawing, the razor is generallydesignated 10 and is composed of a head 12, blade 14, guard 16 andhandle 18.

3,383,764 Patented May 21, 1968 ICC The head 12 is in the form of arelatively thin elongated member which is straight in longitudinalsection, as will be apparent in FIGURES 2 and 3, but downwardly curvedor arched transversely as shown in FIGURE 1. The head 12 has integralpins Ztl projecting downwardly from the concave undersurface thereof.The pins, before assembly ofthe razor, are cylindrical throughout theirlengths, as seen in FIGURE 3, and are spaced lapart longitudinally ofthe head. The pins 'are located equal distances from the ends of thehead and are disposed midway between the opposite side edges thereof, aswill be apparent in FIG- URES l and 4.

The blade 14 may be an ordinary double-edged iiexible metal blade havingthe two shaving edges 22 and 24. The outline of the razor blade issimilar to the outline of the head 12, as will be appreciated -by acomparison of FIGURES 4 and 6. Thus the razor blade is of thin stock andrelatively long and its side and end edges will be seen to projectslightly beyond the corresponding edges of the head when the parts ofthe razor are assembled. The binde may be similar to Athe type which issold separately for use land replacement in the conventional safetyrazor, although it will be understood that the blade when used as a partof the razor herein described will -be a permanent part of the assemblyand will be disposed of when the entire :assembly is thrown away.

lThe guard 16 is in the form of a relatively thin elongated member whichis approximately equal in length to the head although slightly widerthan the head to underlie the cutting edges of the blade when the partsof the razor are assembled. The guard is straight in longitudinalsection, as seen in FIGURES 2 and 3, and arched 0r downwardly curvedtransversely as shown in FIGURE 1. The guard has on its underside acentral downwardly extending hollow boss 2d. formed as an integral partof the guard. The boss is threaded on the inside. The end of theelongated handle 18 threads into the boss 24.

The head 12, guard 16 and handle 1S may be formed of any suitablematerial, but preferably are formed of an inexpensive plastic which `canbe readily molded. A number of the well-known thermoplastic resins aresuitable. Suitable materials are vinyl and cellulose resins. The pins29, being integral parts of the head 12, are of course molded at thesame time ras the head and formed of the same material. An inexpensivematerial for these parts of the razor is preferred because it isintended that the razor will be a throw-'away item. In other words, itwill be used once or twice, or until the edges of the blade become dull,and then the entire razor will be thrown away. Obviously, of course, thehandle 18 would not have to be thrown away since it is separable fromthe head, blade and guard.

The parts of the razor are shown in FIGURE 3 before assembly. It will benoted that the guard 16 has holes 26 which are spaced apart the samedistance as pins 2t) and large enough to permit the pins to freely enterthe holes. The blade 1d has an elongated slot or cutout portion 28formed with generally circular portions 3) likewise spaced apart thesame distance as pins 2@ and of a size to freely receive the pins.Considering FIGURES 2 and 3, the parts 12, 14 and 16 of the razor aremoved together during assembly so that the blade is clamped between thehead 12 and guard 16 and the pins 253 project through the openings 3) inthe blade and 26 in the guard. In this condition of the parts the guard16 underlies the head 12 and the Ablade is sandwiched between. The bladewill llex, as shown in FIGURE 1, to lie in surface-tosurface relationwith the opposite faces of the head and guard. Then the projecting endsof the pins are upset or flattened out to provide in eitect rivet heads32 which are larger than the holes 26 in the guard and hence engage andunderlie thc concave undersurface of thc guard to permanently secure theguard, blade and head together. The rivet heads 32 may be upset by theapplication of heat and pressure. The pin 34, in FIGURE 2, is a pressureapplying member shown exerting sucient force against the projecting endof one of the pins to upset it and form the rivet head.

The assembly thus formed is a permanent assembly and will be thrown awayafter it has been used a few times. For this reason the parts of theassembly are made of inexpensive material.

What I claim as my invention is:

1. A razor comprising a head in the forni of a relatively thin elongatedmember, a separate guard likewise in the form of a relatively thinelongated member underlying said head member, a double-edged bladeinterposed and clamped between said head and guard members with theopposite cutting edges of said blade exposed along the oppositelongitudinal edges of said head and guard members, means permanentlysecuring said head member, guard member and blade together including apair of parallel pins formed integrally with said head member andextending at right angles thereto, said pins being spaced from oneanother on the longitudinal center line of said head member and locatedequal distances from the longitudinal center of said head member, holesin said blade and guard member located on the longitudinal center linethereof and registering with said pins, said pins extending through saidholes in said blade and guard member and terminating beyond said guardmember, said head and guard members and pins being formed of aninexpensive, disposable thermoplastic material deformable by theapplication of heat and pressure, and said pins having integral,deformed and enlarged ends of greater cross section than seid holes insaid guard member and engaging the side of said guard member remote fromsaid head member to permanently secure said head member, guard memberand blade together, said guard member having an integral boss on saidremote side thereof disposed on the longitudinal center line thereofmidway between said holes therein, and an elongated handle having oneend secured to said boss and projecting from said guard member at rightangles thereto.

References Cited UNITED STATES PATENTS 1,007,133 10/1911 Murphy 30-74.11,135,776 4/1915 De Mesquite. 30`58 1,729,657 10/192'9 De Mesquita 30-581,864,995 6/1932 Frost 30-32 1,991,289 2/1935 Moses 30-73 X 2,078,1504/1937 Masip et al. 30-32 2,911,711 11/1959 Loughlin 30-32 2,952,9109/1960 Meohas 30-32 MYRON C. KRUSE, Primary Examiner.

